/* ============================================================
 * videos.css — Trading Journal 视频频道样式 v0.1.0
 * ============================================================
 * 作用域: #page-videos .videos-* / .video-*
 * 配套: src/videos.js
 *
 * 风格基准:
 *   - 宽度: max-width 1300px (与 Statistics/答疑/播报统一)
 *   - 色 token: var(--bg2/text/text2/text3/border/accent/...) 全部复用主题
 *   - 字体: var(--font-mono) 用于 meta/duration
 *
 * 布局核心:
 *   - 列表态: .videos-grid (auto-fill 280px minmax) 卡片网格
 *   - 详情态: .video-detail (16:9 iframe + 标题 + 描述)
 *   - 响应式: 小屏 (≤640px) 网格降为单列
 * ============================================================ */

/* ============================================================
 * 页容器
 * ============================================================ */
#page-videos {
  display: none;
  flex-direction: column;
  overflow: hidden;
}
#page-videos.active {
  display: flex;
}
#page-videos .videos-wrap {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

/* 滚动条 (复用 qa 风格, 让深色主题统一) */
#page-videos *::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
#page-videos *::-webkit-scrollbar-track {
  background: transparent;
}
#page-videos *::-webkit-scrollbar-thumb {
  background: var(--border, #2a2a2a);
  border-radius: 3px;
}
#page-videos *::-webkit-scrollbar-thumb:hover {
  background: var(--text3, #444);
}

/* ============================================================
 * 工具栏 (分类筛选条所在)
 * ============================================================ */
#page-videos .videos-toolbar {
  flex: 0 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 24px 8px;
  border-bottom: 1px solid var(--border);
  background: var(--bg, transparent);
}
#page-videos .videos-toolbar-left {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

/* ============================================================
 * 分类筛选条 (仿 qa-cat-bar)
 * ============================================================ */
#page-videos .videos-cat-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}
#page-videos .videos-cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: transparent;
  color: var(--text2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  font-family: var(--font-mono, monospace);
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
  user-select: none;
}
#page-videos .videos-cat-chip:hover {
  background: transparent;
  color: var(--text);
  border-color: var(--text3);
}
#page-videos .videos-cat-chip.active {
  background: rgba(230, 126, 34, 0.08);
  color: var(--accent);
  border-color: var(--accent);
}
#page-videos .videos-cat-chip .videos-cat-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ============================================================
 * 列表 body (滚动容器)
 * ============================================================ */
#page-videos .videos-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 16px 0 32px;
}

/* 加载/空状态 */
#page-videos .videos-loading,
#page-videos .videos-empty {
  text-align: center;
  padding: 60px 16px;
  color: var(--text-muted, #888);
  font-size: 14px;
}
#page-videos .videos-empty-icon {
  font-size: 36px;
  margin-bottom: 12px;
  opacity: .6;
}
#page-videos .videos-empty-text {
  color: var(--text3, #666);
}

/* ============================================================
 * 卡片网格 ★ 核心布局
 * ============================================================ */
#page-videos .videos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  max-width: 1300px;
  margin: 0 auto;
  padding: 0 24px;
}

#page-videos .video-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
  display: flex;
  flex-direction: column;
}
#page-videos .video-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent, #e67e22);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* 缩略图 (16:9 比例) */
#page-videos .video-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  position: relative;
  overflow: hidden;
}
#page-videos .video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
#page-videos .video-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 42px;
  color: var(--text3, #555);
  background: linear-gradient(135deg, var(--bg2), #1a1a1a);
}

/* 时长徽章 (右下角) */
#page-videos .video-duration {
  position: absolute;
  bottom: 6px;
  right: 6px;
  background: rgba(0, 0, 0, 0.78);
  color: #fff;
  font-family: var(--font-mono, monospace);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 3px;
  pointer-events: none;
}

/* 卡片信息区 */
#page-videos .video-info {
  padding: 10px 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
#page-videos .video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  /* 固定 2 行高度 (1.4em*2) 让卡片对齐 */
  min-height: 2.8em;
}
#page-videos .video-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-family: var(--font-mono, monospace);
  font-size: 11px;
  color: var(--text2, #999);
}
#page-videos .video-cat-tag {
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 600;
  letter-spacing: 0.3px;
  font-size: 10.5px;
  text-transform: uppercase;
}
#page-videos .video-time {
  color: var(--text3, #666);
}

/* ============================================================
 * 详情页 (大屏 YouTube iframe 播放)
 * ============================================================ */
#page-videos .video-detail {
  max-width: 1300px;
  margin: 0 auto;
  padding: 8px 24px 32px;
}

/* 返回按钮 */
#page-videos .video-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text2);
  font-size: 12px;
  font-family: var(--font-mono, monospace);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  margin-bottom: 14px;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
#page-videos .video-back:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(230, 126, 34, 0.06);
}

/* 视频播放器 (16:9) */
#page-videos .video-player {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}
#page-videos .video-player iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}
#page-videos .video-player-error {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--text3, #888);
  font-size: 13px;
  font-family: var(--font-mono, monospace);
}

/* Bunny 异步签名占位 (sign-video-token 调用期间) */
#page-videos .video-bunny-slot {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
#page-videos .video-bunny-loader {
  color: var(--text3, #888);
  font-size: 14px;
  font-family: var(--font-mono, monospace);
  letter-spacing: 0.5px;
  animation: bunnyLoaderPulse 1.4s ease-in-out infinite;
}
@keyframes bunnyLoaderPulse {
  0%, 100% { opacity: 0.5; }
  50%      { opacity: 1; }
}

/* 详情元信息 */
#page-videos .video-detail-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin: 18px 0 10px;
  line-height: 1.35;
}
#page-videos .video-detail-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-family: var(--font-mono, monospace);
  font-size: 12px;
  color: var(--text2, #999);
  margin-bottom: 12px;
}
#page-videos .video-detail-meta .video-cat-tag {
  font-size: 11px;
  padding: 3px 8px;
}
#page-videos .video-meta-sep {
  color: var(--text3, #555);
}
#page-videos .video-duration-text {
  color: var(--text2);
}

/* 标签 */
#page-videos .video-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
#page-videos .video-tag {
  padding: 3px 9px;
  border-radius: 4px;
  background: var(--bg2, #1a1a1a);
  border: 1px solid var(--border);
  color: var(--text2);
  font-family: var(--font-mono, monospace);
  font-size: 11px;
}

/* 描述 */
#page-videos .video-description {
  color: var(--text2);
  font-size: 14px;
  line-height: 1.7;
  padding: 14px 0 0;
  border-top: 1px solid var(--border);
  white-space: normal;
  word-break: break-word;
}

/* ============================================================
 * 响应式: 小屏单列
 * ============================================================ */
@media (max-width: 720px) {
  #page-videos .videos-toolbar {
    padding: 10px 14px 6px;
  }
  #page-videos .videos-grid {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 0 14px;
  }
  #page-videos .video-detail {
    padding: 8px 14px 24px;
  }
  #page-videos .video-detail-title {
    font-size: 18px;
  }
}

/* 中等屏幕: 至少 2 列 */
@media (min-width: 721px) and (max-width: 900px) {
  #page-videos .videos-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================================
 * 2026-05-31 视频「可见但锁」：锁定卡罩层（金质，与全站升级引导统一）
 *   渲染由 videos.js renderVideoCard 加 .video-card-locked + .video-lock-overlay
 * ============================================================ */
.video-card-locked { cursor: pointer; }
.video-card-locked .video-thumb { position: relative; }
.video-card-locked .video-thumb img { filter: brightness(0.5); }
.video-lock-overlay {
  position: absolute; inset: 0; z-index: 3;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
  background: rgba(4,7,12,0.32);
}
.video-lock-icon {
  width: 36px; height: 36px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg,#f3d690 0%,#d4a04a 100%);
  color: #241902; box-shadow: 0 3px 10px rgba(212,160,74,0.4);
}
.video-lock-text {
  font-size: 12px; font-weight: 700; color: #fff;
  text-shadow: 0 1px 4px rgba(0,0,0,0.6);
}